Process for extracting fatty substances from fresh (unbroken) oilfruits, moist raw wool, and the like.



F. PRAN K. PROCESS FOR. EXTRAGTING FATTY SUBSTANCES FROM FRESH (UNBROKEN) OIL MOIST RAW WOOL, AND THE LIKE. APPLICATION FILED MAR. 28, 1904.

FRUITS,

WITNESSES Patented Mar. 16, 1909.

PATENT OFFICE.

V FRITZ FRANK, 0F BERLIN, GERMANY.

PROCESS FOR EXTRAOTING FATTY SUBSTANCES FROMQFBESH FRUITS, MOIST RAW WOQL, AND THE LIKE.

Specification of Letters Patent.

7 Application meanness, 1904. Serial in. 200,402.

.Batentedlleroh 26,1908.

To allwhmn it may concern:

Be it known that 1, Farm FRANK, chemist, a-subject of the German Emperor, residing at 2 Anider Jerusalemer Kirche, Berlin, Germany, "h ave invented certain new and useful improvements in Trocesses for Extractin Fatt Substances from Fresh (Unbroken Oilruits, Moist Raw Wool, and the Like; and I do hereb declare the 'followin to be a lull, clear, an -'6Xt0t description 0 the :invention, such as 'enable others skilled in the art to which it appertains to make and use the same.

My invention relates "to a process for extractiing fat from moist materials, such as oil-fruits, moist Wool and the like. a

I am aware that it has already been attempted to extract fat from materials contammgasmall'quantit of water such asfor instancefrom bones. '1- eoriginators of these known processes however were'of the opinion that the boiling point of the solvent must necessarily be above that of water. Commercial solvents, containing portions bo/fling under 100 centi 'rade are therefore subjectcd to fractionaldistillation. Employing so hi h boiling solvents, however, involves a doub e disadvantage, because in the first place a lar e number of solvents are excluded, whi hotherwise would be eminent fitted for extracting urpo'ses, and secondly because some value; 1e fats would be deteriorated by heating them to so high tem- .peratures.

, By my improved process I find it possible to extract fat by means of solvents boiling at'tem'perstures under 1-0Q centigrade from substances containing considerable quantitiescf waten'ferinstanceirnits having an exterior pu containing 'fatt oils, such as the fruits of late 'neensis, li -late 'mlanococ'ca, Astrocmfium vu are, Astrocmv'ium acaule and Olea 'em opza, e raw material not'being previously reduced to small pieces.

In the present process, the moist material is treated by a stream of dry va or from a fat solvent ol low boiling point; that at water. dry vapor 'vo'la'tilizes the moisture in the material without boiling it and sealing the pores by steam, and-carriesthe'watervrapor forward'and away while the sdlvent vapor replaces it in the pores, min into contact withex osedfatty mattors. e 'vapors being at the boiling point ofthe solvent-do not themselves condense to ower than any great extent but they are absorbed by the fatty matter, diluting it, and rendering it more fluid and of greater volume, so that it drips or ercolates out ofthe material and can be col ected. turedffat and solvent, the latter can of course afterward 'be expelled by heat. The water as it vo'latilizes is carried away by the florward moving stream of solvent vapor, and the mixture is subsequently condensed and separated elsewhere, the re ained solvent belng dried and made su'ita 'le for further use. Volatilization of water being effected below its boilin point, the solvent vapors e lo ed for this purpose, in accordance wit It e ordinary lawsjgoverning volatilization should 'be dry, e., free from Water va or.

n the accom anyin tus is illustrate which prefer to emp oyin executing my herein described process.

The figure shows a vertical section'throug'h the apparatus such parts being omitted which are not essential for-the exp anation of the process.

In the drawing, 1 is a still withthe heating worm 2, the manometer 3, the man-hole 4,

' and -the discharging valve 5.

6 is a cylindric extraction vessel, which is se arated from the still 1 by the sieve 7 W ch carries the raw material. Vessel'fi is accessible by the man-holes 8 and '9, and provided with the pipe '10, Wh'ichleads to the condenser 11.

v 1.2 is a coil providedwith a large number of small openings for introducing steam, .and 13 is a jacket surrounding the extraction vessel 6 When not containing steam the jacket and containedair serve as a heat insulating means for maintaining tem eratures within-the extraction vessel. .A ranch pi e 14' provided with the cook 15 is introduce point of vessel 1.

My process is carried on as follows: The raw material is'stackedin a high f-layer on the sieve 7. A sufiicien't quantity-dfsollvent such as for instance ahydro calbon'boi'fing at a temperature of about centigrade "is then introduced 'into'the stillfl b means (if the inlet 4. 'Thc'latteris then'tj my dlosed From the collected mix d-rawing an ap arammmn on;-

for heating it by ordinary steam.

at the Ilewest and steam "is introducedinto the worm, 2.

The hydrocs'irbon is thus evaporated and the vapors "ascend and-are condensed to some extent in the pores of the material treated in and on the contained fatty matters. The solution thus formed falls back into thefstill in the shape of drops. The water contained in the material is evaporated by the hydrocarbon vapor and a mixture of evaporated solvent and water vapor is carried upward and discharged through pipe 10 into the condenser 11, where the vapors are condensed such material at about the boilingltemperature of the solvent. When all t e fathas been extracted and has collected in the still it will be necessary to expel the solvent still contained in a liquid or vaporous state in the material or the vessel 6. For this purose I provide the coil 12 by which I introuce ordinary steam. Thus the solvent contained in and about the material is driven off to the condenser. In order to assist this process steam may also be introduced into the 'acket 13 by which means any loss of heat is e ectually counteracted. In order to reaim the solvent contained in the bottom of the still I now open the cock 15 thus introducing steam into the solution and thereby evaporating and drivingl off what of the solvent ma be left. T e fat can then be drawn 0 through the valve 5 and the apparatus can be emptied and prepared for receiving a fresh charge.

Vapors of all fat solvents being heavier than either air orwater va or, upon boiling the solvent in the fat we (1)the vapors slowly rise, displacing and driving before them the air in the apparatus. As they reach and surround the moist material to be extracted, moisture evaporates from it into said va ors and the moist vapors, being specifica ly li hter, also flow upward and forward above t e heavy vapor of the solvent, and to and through the outside condenser shown. The difference in specific gravity precludes the possibility of the water vapors -going downward 'and reaching the fat.

In this method, it will be noted, water and fatty matters are both extracted from the moist material under oing treatment and separately removed. 11 prior methods it has been deemed necessary either to perform extraction at temperatures above the boiling point of water or to' dry the materialbefore exposing it to the solvent. High temperatures are usually injuriousto the quality of the fatty matters to be extracted while in drying, 'oxidationis almost inevitable. In the present method, the temperature is kept within a safe limit, oxidation is precluded and yet thorough extraction is practicable, the water being removed from the sphere of action by the simple expedient of furnishing enough solvent to carry it forward and away. Having thus fully described my invention, what I claim as new is 1. The process of extracting fatty matters from very moist oleaginous material which consists 1n pgitectingsuch material against external coo and passing through such protected materia a continuous current of dry vapor of a fat solvent of low boiling point at a temperature below the boiling point of water, said-current passing said material at a rate materially faster than the solvent can condense therein and at a rate sufficiently fast to volatilize and carry forward substantially all the moisture in said material, and

separately removing the volatilized water with the excess of solvent vapor and the fat with the condensed solvent.

2. The process of extracting fatty matters from very moist oleaginous materials which consists 1n rotecting such material against external coo ing and passing upward through such protected material a continuous current of dry va point, sai current passing said material at a rate materially faster than the solvent can condense therein and at a rate sufficiently fast to volatilize and carry forward substantially all the moisture in said material, removing above suchrnaterial the excess of solvent vapor and the volatilized water carried forward thereb and removing below such material fat iluted with condensed solvent.

3. The process of extracting fatty matters from very moist oleaginous materials which consists in maintaining such material at the boilin oint of a low-boiling fat solvent while beihw the boiling point of water, shielding such material against external cooling and continuously passing upward through said material a stream of vapor of such solvent at a rate materially faster than it will condense therein and at a rate sufficiently fast to volatilize and carry forward substantially all the moisture in said material, removing above the materials the excess of solvent vapor and the volatilized water carried forward thereby, and removing below the materials fat diluted with condensed solvent.

4. The process of extracting fatty matters from moist oleaginous materials which cohsists in subjecting said materials in a vertical column protectec a ainst loss of heat to an ascending column 0 dry solvent vapor at a temperature below the boiling point of water,

. said vapor column traveling. at a rate materially faster than the vapor will condense in the material, removing vaporized water by leading off the same admixed with the cxor of a fat solvent of low boiling cess of solvent vapor from the top of the In testimony whereof I have affixed my column and allowing fat and condensed solsignature to the specification, in the presence vent to drop from the base of the column of of two witnesses.

materials until water and fat are removed FRITZ FRANK. 5 from the said materials, and in then driving Witnesses:

out solvent vapors in and around the ma- HENRY HASPER,

terial by a current of steam. WOLDEMAR HAUPT. 

